:root {
  --navy: #15345c;
  --blue: #2c63a8;
  --light: #f4f7fb;
  --text: #1f2a37;
  --muted: #5b6777;
  --white: #ffffff;
  --border: #dbe3ee;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  background: var(--white);
  line-height: 1.6;
}
a { color: var(--blue); }
header {
  background: var(--navy);
  color: var(--white);
}
.nav {
  max-width: 1080px;
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  color: var(--white);
  text-decoration: none;
  font-size: 1.25rem;
  font-weight: 700;
}
nav a {
  color: var(--white);
  text-decoration: none;
  margin-left: 20px;
}
.hero {
  background: linear-gradient(135deg, #15345c, #2c63a8);
  color: var(--white);
  padding: 80px 24px;
}
.hero-inner, .container {
  max-width: 1080px;
  margin: 0 auto;
}
.hero h1 {
  font-size: clamp(2.2rem, 5vw, 4rem);
  line-height: 1.1;
  margin: 0 0 20px;
}
.hero p {
  max-width: 760px;
  font-size: 1.2rem;
}
.button {
  display: inline-block;
  background: var(--white);
  color: var(--navy);
  text-decoration: none;
  padding: 12px 20px;
  border-radius: 8px;
  font-weight: 700;
  margin-top: 12px;
}
section { padding: 56px 24px; }
section.alt { background: var(--light); }
.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
}
h1, h2, h3 { line-height: 1.25; }
.page-title {
  background: var(--light);
  padding: 48px 24px;
  border-bottom: 1px solid var(--border);
}
.content {
  max-width: 900px;
  margin: 0 auto;
  padding: 48px 24px 72px;
}
.content h2 { margin-top: 34px; }
.notice {
  background: #eef5ff;
  border-left: 4px solid var(--blue);
  padding: 16px 18px;
  border-radius: 6px;
}
footer {
  background: #102a49;
  color: var(--white);
  padding: 30px 24px;
}
footer .container {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
footer a { color: var(--white); }
.small { color: var(--muted); font-size: .95rem; }
@media (max-width: 760px) {
  .grid { grid-template-columns: 1fr; }
  nav a { margin-left: 10px; }
  .nav { align-items: flex-start; }
}